Alex Mustard - On The Move
A large school of lowfin rudderfish (Kyphosus vaigiensis), each about 40 cm long, swimming through a channel in a coral reef at dusk.
Seeing this mass of fish approaching, I switched to a long exposure and panned my camera to capture their movement as the swept past me.
Location: Alimatha Island, Vavuu Atoll, Maldives. Indian Ocean.